柴油机双层隔振非线性系统主动隔振研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (13) : 133-139.

论文

柴油机双层隔振非线性系统主动隔振研究

肖斌1，高超1，张艾萍1，刘志刚2

作者信息 +

Investigation of Active Vibration Isolation on Nonlinear Diesel Two-stage Vibration Isolation System

XIAO Bin1, GAO Chao1, ZHANG Ai-ping1, LIU Zhi-gang2

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文章历史 +

摘要

针对柴油机双层隔振系统，考虑误差通道严重非线性影响动力系统建模、振动分析以及主动控制策略设计、隔振效果，本文在预补偿模型参考自适应逆控制的线性化算法基础上，集成自适应陷波算法，形成自适应复合控制策略。在柴油机双层隔振系统主动隔振试验中，基于Hammerstein型非线性系统解耦及基频广义频响函数分析，建立线性化参考模型及提取误差通道相频特性曲线，分析提出的自适应复合控制策略，结果表明：接近目标非线性系统的线性参考模型，能够获得好的线性化效果和提供精确的误差通道相频特性曲线，并与相频曲线FIR模型拟合一起，决定着自适应复合控制策略的隔振效果；而与系统能量建模结果对比表明，只有通过消除系统非线性来抑制其对谐频振动影响，才能获得最优的系统振动能量级隔振效果。

Abstract

For diesel two-stage vibration isolation system, when considering that heavy nonlinearity of the secondary path influence dynamical system modelling, vibration analysis as well as active control strategy designing and its control performance, in this paper a hybrid adaptive control strategy is presented by integrating adaptive notch filter algorithm with Model Reference Adaptive Inverse Control with Pre-Compensator (PCMRAIC). In active vibration isolation experiment of diesel two-stage vibration isolation system, based on decoupling Hammerstein nonlinear system and analyzing the Generalized Frequency Response Functions (GFRFs), linearized reference models and phase curves of the secondary path were yielded, and then the hybrid adaptive control strategy was investigated, whose results showed that, the linearized reference model that approximated the aimed nonlinear system can be employed to realize excellent linearization of system and to provide accurate phase curves of the secondary path, therewith the linearized reference model and FIR model of its phase curve fitting codetermine performance of the hybrid adaptive control strategy. In addtion, the results of active vibration isolation experiment were compared with vibrational energy modeling, which showed that the optimal isolation effect in vibrational energy level is obtained only when to eliminate nonlinarity and consequently to suppress harmonic vibration of the system.

导出引用

肖斌1，高超1，张艾萍1，刘志刚2. 柴油机双层隔振非线性系统主动隔振研究[J]. 振动与冲击, 2015, 34(13): 133-139

XIAO Bin1, GAO Chao1, ZHANG Ai-ping1, LIU Zhi-gang2. Investigation of Active Vibration Isolation on Nonlinear Diesel Two-stage Vibration Isolation System[J]. Journal of Vibration and Shock, 2015, 34(13): 133-139

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